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ffi_pointer.cpp
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ffi_pointer.cpp
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#include "builtin/array.hpp"
#include "builtin/class.hpp"
#include "builtin/exception.hpp"
#include "builtin/fixnum.hpp"
#include "builtin/float.hpp"
#include "builtin/ffi_pointer.hpp"
#include "builtin/native_function.hpp"
#include "builtin/string.hpp"
#include "builtin/symbol.hpp"
#include "ffi_util.hpp"
#include "object_utils.hpp"
#include "object_memory.hpp"
#include "ontology.hpp"
#include "windows_compat.h"
#ifdef RBX_WINDOWS
#include <winsock2.h>
#else
#include <dlfcn.h>
#include <arpa/inet.h>
#endif
namespace rubinius {
void Pointer::init(STATE) {
GO(ffi_pointer).set(ontology::new_class_under(state, "Pointer", G(ffi)));
G(ffi_pointer)->set_object_type(state, PointerType);
G(ffi_pointer)->set_const(state, "CURRENT_PROCESS",
Pointer::create(state, dlopen(NULL, RTLD_NOW | RTLD_GLOBAL)));
G(ffi_pointer)->set_const(state, "DLSYM",
Pointer::create(state, (void*)dlsym));
G(ffi_pointer)->set_const(state, "DLOPEN",
Pointer::create(state, (void*)dlopen));
G(ffi_pointer)->set_const(state, "DLERROR",
Pointer::create(state, (void*)dlerror));
// Not exactly the right place, but FFI needs this and this is the main
// FFI file atm.
Array* suffix = Array::create(state, 2);
#ifdef _WIN32
suffix->set(state, 0, String::create(state, "dll"));
#else
#ifdef __APPLE_CC__
suffix->set(state, 0, String::create(state, "bundle"));
suffix->set(state, 1, String::create(state, "dylib"));
#else
suffix->set(state, 0, String::create(state, "so"));
#endif
#endif
G(ffi)->set_const(state, "LIB_SUFFIXES", suffix);
// Legacy. Fix the kernel to not need this.
String* main_suffix;
#ifdef _WIN32
main_suffix = String::create(state, ".dll");
#else
#ifdef __APPLE_CC__
main_suffix = String::create(state, ".bundle");
#else
main_suffix = String::create(state, ".so");
#endif
#endif
G(rubinius)->set_const(state, "LIBSUFFIX", main_suffix);
}
Pointer* Pointer::create(STATE, void* ptr) {
Pointer* obj = state->new_object<Pointer>(G(ffi_pointer));
obj->pointer = ptr;
obj->autorelease = false;
obj->set_finalizer = false;
return obj;
}
Pointer* Pointer::allocate(STATE, Object* self) {
Pointer* obj = state->new_object<Pointer>(as<Class>(self));
obj->pointer = 0;
obj->autorelease = false;
obj->set_finalizer = false;
return obj;
}
Pointer* Pointer::allocate_memory(STATE, Object* self, Fixnum* size) {
Pointer* obj = state->vm()->new_object<Pointer>(as<Class>(self));
obj->pointer = malloc(size->to_native());;
obj->autorelease = false;
obj->set_finalizer = false;
return obj;
}
Integer* Pointer::get_address(STATE) {
return Integer::from(state, (uintptr_t)pointer);
}
Integer* Pointer::set_address(STATE, Integer* ptr) {
pointer = (void*)ptr->to_native();
return ptr;
}
Pointer* Pointer::add(STATE, Integer* amount) {
return Pointer::create(state, (char*)pointer + amount->to_native());
}
Object* Pointer::set_autorelease(STATE, Object* val) {
autorelease = val->true_p() ? true : false;
if(autorelease && !set_finalizer) {
state->memory()->needs_finalization(this,
(FinalizerFunction)&Pointer::finalize);
set_finalizer = true;
}
return val;
}
Object* Pointer::free(STATE) {
if(pointer) ::free(pointer);
autorelease = false;
pointer = NULL;
return cNil;
}
void Pointer::finalize(STATE, Pointer* ptr) {
if(ptr->autorelease && ptr->pointer) {
::free(ptr->pointer);
}
ptr->pointer = NULL;
}
String* Pointer::read_string(STATE, Fixnum* len) {
return String::create(state, (char*)pointer, len->to_native());
}
String* Pointer::read_string_to_null(STATE) {
return String::create(state, (char*)pointer);
}
Pointer* Pointer::write_string(STATE, String* str, Fixnum* len) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write string");
native_int n = len->to_native();
if(str->byte_size() < n) n = str->byte_size();
memcpy(pointer, (void*)str->byte_address(), n);
return this;
}
Integer* Pointer::write_char(STATE, Integer* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write char");
unsigned char s = val->to_native();
*(unsigned char*)pointer = s;
return val;
}
Integer* Pointer::read_char(STATE, Object* sign) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read char");
if(CBOOL(sign)) {
return Integer::from(state, *(char*)pointer);
} else {
return Integer::from(state, *(unsigned char*)pointer);
}
}
Integer* Pointer::write_short(STATE, Integer* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write short");
unsigned short s = val->to_native();
*(unsigned short*)pointer = s;
return val;
}
Integer* Pointer::read_short(STATE, Object* sign) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read short");
if(CBOOL(sign)) {
return Integer::from(state, *(short*)pointer);
} else {
return Integer::from(state, *(unsigned short*)pointer);
}
}
Integer* Pointer::write_int(STATE, Integer* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write int");
*(int*)pointer = val->to_native();
return val;
}
Integer* Pointer::read_int(STATE, Object* sign) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read int");
if(CBOOL(sign)) {
return Integer::from(state, *(int*)pointer);
} else {
return Integer::from(state, *(unsigned int*)pointer);
}
}
Integer* Pointer::write_long(STATE, Integer* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write long");
*(long*)pointer = val->to_native();
return val;
}
Integer* Pointer::read_long(STATE, Object* sign) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read long");
if(CBOOL(sign)) {
return Integer::from(state, *(long*)pointer);
} else {
return Integer::from(state, *(unsigned long*)pointer);
}
}
Integer* Pointer::write_long_long(STATE, Integer* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write long long");
*(long long*)pointer = val->to_long_long();
return val;
}
Integer* Pointer::read_long_long(STATE, Object* sign) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read long long");
if(CBOOL(sign)) {
return Integer::from(state, *(long long*)pointer);
} else {
return Integer::from(state, *(unsigned long long*)pointer);
}
}
Float* Pointer::write_float(STATE, Float* flt) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write float");
*(float*)pointer = (float)flt->val;
return flt;
}
Float* Pointer::read_float(STATE) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read float");
return Float::create(state, (double)(*(float*)pointer));
}
Float* Pointer::write_double(STATE, Float* flt) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write double");
*(double*)pointer = flt->val;
return flt;
}
Float* Pointer::read_double(STATE) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read double");
return Float::create(state, *(double*)pointer);
}
Pointer* Pointer::write_pointer(STATE, Pointer* ptr) {
if(!pointer) Exception::argument_error(state, "invalid pointer to write pointer");
*(void**)pointer = ptr->pointer;
return ptr;
}
Pointer* Pointer::read_pointer(STATE) {
if(!pointer) Exception::argument_error(state, "invalid pointer to read pointer");
return Pointer::create(state, *(void**)pointer);
}
Object* Pointer::network_order(STATE, Fixnum* offset, Fixnum* intsize) {
if(!pointer) Exception::argument_error(state, "invalid pointer to network order value");
native_int size = intsize->to_native();
char* pos = ((char*)pointer) + offset->to_native();
#define ptr_to(type) (*(type*)pos)
switch(size) {
case 2:
ptr_to(uint16_t) = htons(ptr_to(uint16_t));
return Integer::from(state, ptr_to(uint16_t));
case 4:
ptr_to(uint32_t) = htonl(ptr_to(uint32_t));
return Integer::from(state, ptr_to(uint32_t));
case 8:
ptr_to(uint32_t) = htonl(ptr_to(uint32_t));
pos += 4; // 32 bits
ptr_to(uint32_t) = htonl(ptr_to(uint32_t));
return Integer::from(state, *(uint64_t*)(pos - 4));
}
return Primitives::failure();
}
Object* Pointer::get_at_offset(STATE, Fixnum* offset, Fixnum* type) {
return get_field(state, offset->to_native(), type->to_native());
}
Object* Pointer::get_field(STATE, int offset, int type) {
Object* ret;
if(!pointer) Exception::argument_error(state, "invalid pointer to get field from");
char* ptr = (char*)pointer;
ptr += offset;
#define READ(type) (*((type*)(ptr)))
switch(type) {
case RBX_FFI_TYPE_CHAR:
ret = Fixnum::from((int)(READ(char)));
break;
case RBX_FFI_TYPE_UCHAR:
ret = Fixnum::from((unsigned int)(READ(unsigned char)));
break;
case RBX_FFI_TYPE_BOOL:
ret = RBOOL(READ(unsigned char));
break;
case RBX_FFI_TYPE_SHORT:
ret = Fixnum::from((int)(READ(short)));
break;
case RBX_FFI_TYPE_USHORT:
ret = Fixnum::from((unsigned int)(READ(unsigned short)));
break;
case RBX_FFI_TYPE_INT:
ret = Integer::from(state, READ(int));
break;
case RBX_FFI_TYPE_UINT:
ret = Integer::from(state, READ(unsigned int));
break;
case RBX_FFI_TYPE_LONG:
ret = Integer::from(state, READ(long));
break;
case RBX_FFI_TYPE_ULONG:
ret = Integer::from(state, READ(unsigned long));
break;
case RBX_FFI_TYPE_FLOAT:
ret = Float::create(state, (double)READ(float));
break;
case RBX_FFI_TYPE_DOUBLE:
ret = Float::create(state, READ(double));
break;
case RBX_FFI_TYPE_LONG_LONG:
ret = Integer::from(state, READ(long long));
break;
case RBX_FFI_TYPE_ULONG_LONG:
ret = Integer::from(state, READ(unsigned long long));
break;
case RBX_FFI_TYPE_PTR: {
void *lptr = READ(void*);
if(!lptr) {
ret = cNil;
} else {
ret = Pointer::create(state, lptr);
}
break;
}
case RBX_FFI_TYPE_STRING: {
char* result = READ(char*);
if(result == NULL) {
ret = cNil;
} else {
ret = String::create(state, result);
}
break;
}
case RBX_FFI_TYPE_STRPTR: {
char* result;
Object* s;
Object* p;
result = READ(char*);
if(result == NULL) {
s = p = cNil;
} else {
s = String::create(state, result);
p = Pointer::create(state, result);
}
Array* ary = Array::create(state, 2);
ary->set(state, 0, s);
ary->set(state, 1, p);
ret = ary;
break;
}
default:
case RBX_FFI_TYPE_VOID:
ret = cNil;
break;
}
return ret;
}
Object* Pointer::set_at_offset(STATE, Fixnum* offset, Fixnum* type, Object* val) {
set_field(state, offset->to_native(), type->to_native(), val);
return val;
}
void Pointer::set_field(STATE, int offset, int type, Object* val) {
if(!pointer) Exception::argument_error(state, "invalid pointer to set field of");
char* ptr = (char*)pointer;
ptr += offset;
#define WRITE(type, val) *(reinterpret_cast<type*>(ptr)) = (type)val
switch(type) {
case RBX_FFI_TYPE_CHAR:
type_assert(state, val, FixnumType, "converting to char");
WRITE(char, as<Fixnum>(val)->to_native());
break;
case RBX_FFI_TYPE_UCHAR:
type_assert(state, val, FixnumType, "converting to unsigned char");
WRITE(unsigned char, as<Fixnum>(val)->to_native());
break;
case RBX_FFI_TYPE_BOOL:
WRITE(unsigned char, CBOOL(val) ? 1 : 0);
break;
case RBX_FFI_TYPE_SHORT:
type_assert(state, val, FixnumType, "converting to short");
WRITE(short, as<Fixnum>(val)->to_native());
break;
case RBX_FFI_TYPE_USHORT:
type_assert(state, val, FixnumType, "converting to unsigned short");
WRITE(unsigned short, as<Fixnum>(val)->to_native());
break;
case RBX_FFI_TYPE_INT:
if(val->fixnum_p()) {
WRITE(int, as<Fixnum>(val)->to_int());
} else {
type_assert(state, val, BignumType, "converting to int");
WRITE(int, as<Bignum>(val)->to_int());
}
break;
case RBX_FFI_TYPE_UINT:
if(val->fixnum_p()) {
WRITE(unsigned int, as<Fixnum>(val)->to_uint());
} else {
type_assert(state, val, BignumType, "converting to unsigned int");
WRITE(unsigned int, as<Bignum>(val)->to_uint());
}
break;
case RBX_FFI_TYPE_LONG:
if(val->fixnum_p()) {
WRITE(long, as<Fixnum>(val)->to_long());
} else {
type_assert(state, val, BignumType, "converting to long");
WRITE(long, as<Bignum>(val)->to_long());
}
break;
case RBX_FFI_TYPE_ULONG:
if(val->fixnum_p()) {
WRITE(unsigned long, as<Fixnum>(val)->to_ulong());
} else {
type_assert(state, val, BignumType, "converting to unsigned long");
WRITE(unsigned long, as<Bignum>(val)->to_ulong());
}
break;
case RBX_FFI_TYPE_FLOAT: {
Float* flt = as<Float>(val);
type_assert(state, val, FloatType, "converting to float");
WRITE(float, flt->to_double(state));
break;
}
case RBX_FFI_TYPE_DOUBLE: {
Float* flt = as<Float>(val);
type_assert(state, val, FloatType, "converting to double");
WRITE(double, flt->to_double(state));
break;
}
case RBX_FFI_TYPE_LONG_LONG:
if(val->fixnum_p()) {
WRITE(long long, as<Fixnum>(val)->to_long_long());
} else {
type_assert(state, val, BignumType, "converting to long long");
WRITE(long long, as<Bignum>(val)->to_long_long());
}
break;
case RBX_FFI_TYPE_ULONG_LONG:
if(val->fixnum_p()) {
WRITE(unsigned long long, as<Fixnum>(val)->to_ulong_long());
} else {
type_assert(state, val, BignumType, "converting to unsigned long long");
WRITE(unsigned long long, as<Bignum>(val)->to_ulong_long());
}
break;
case RBX_FFI_TYPE_PTR:
if(val->nil_p()) {
WRITE(void*, NULL);
} else {
Pointer *mp = as<Pointer>(val);
type_assert(state, val, PointerType, "converting to pointer");
WRITE(void*, mp->pointer);
}
break;
case RBX_FFI_TYPE_STRING: {
const char* result;
if(val->nil_p()) {
result = NULL;
} else {
String* str = as<String>(val);
/* TODO this is probably not correct. Saving away an
* internal pointer to the string means that when the string
* moves, the data will point at the wrong place. Probably need to
* copy the string data instead */
result = str->c_str(state);
}
WRITE(const char*, result);
break;
}
default:
rubinius::bug("Unknown FFI type");
}
}
void Pointer::Info::mark(Object* obj, ObjectMark& mark) {
}
}